The Free Wiki World Map
Transcript of The Free Wiki World Map
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If you want
SEX you're in the wrong room.
Sex is in room 1.
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What is OpenStreetMap?
● Wiki-style world map of everything
● CC-BY-SA licensed
● Started in the UK, 3 years ago
● 20k registered users (10% active),175m GPS points
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Why do we do it?
● UK motif: Ordnance Survey lording it over
● General idea: cool things can be done with proper geodata
● Collecting data is fun
● Political aspect: maps == power
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Political aspect: Maps == Power
● History is full of examples
● Mapping the planet is an area of natural monopoly and we don't want THEM to have it.
● Monopoly fears not far-fetched: Teleatlas and Navteq takeovers
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The OpenStreetMap Spirit
● Very little rules – no project management
● “brutally pragmatic”
● broad community participation: “we have unlimited free labour”
● “GIS standardophobia”
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What have we got?
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How does it work?
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How does it work?
+
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How does it work?
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How does it work?
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Data model
Trackpoints
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Data model
Nodes
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Data model
Ways
highway = residentialname = Schillerstraßeoneway = true
highway = secondaryname = Kaiserallee
Tags
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Maps == power revisited: abuse
● “Result-oriented vandalism”:
Don't like lorries in your backyard?
Classify the road as a gravel trackand they'll go away!
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Power and abuse
● first edit wars (Cyprus)
● hard to deal with these and not be drawn into conflict – lessons might be learned from Wikipedia
● technical challenges (revision history – but everything is linked!)
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Why is it cool?
● People can get the maps they want or need
● Custom routing:
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Why is it cool?
● Mapping the planet means physical exercise for Hackers ;-)
● You get the source!
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Heartbeat animation / idea and script by Barry Crabtree.
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Nightfall animation / idea and script by Barry Crabtree.
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Non-sponsored ad ;-)
Buy our book (out February 2008)
Frederik Ramm, Jochen Topf:
OpenStreetMap
Lehmanns Verlag, Hamburg
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The following two slides are not a planned part of the presentation but may be used if the topics come up.
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License Issues
● CC-BY-SA unsuitable for geodata
● OSM not licensor – cannot give authoritative answers on license questions
● remixing with stuff from other free sources difficult
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The OSM Toolchain
API(Rails)
Editors
Potlatch(Flash)
JOSM(Java)
Data Base
...
Renderers
Mapnik
tiles@home
osmarender,pdfatlas,
...
planetdump
holyMySQL
Viewers
SlippyMap
(OpenLayers)
Googletiles
Googletiles